泌阳凹陷下第三系构造特征与沉积体系
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摘要
在深入研究泌阳凹陷大量岩心、测井和地震资料的基础上,证实泌阳凹陷具有独特的盆地结构样式和形成机制。南侧及东侧盆地主控断裂发育区为陡坡生长断裂型层序分布区,北侧为典型的缓坡型层序样式,相似于墨西哥湾生长断层层序地层模式。通过对层序体系域构成具有重要控制作用的独特的构造背景条件分析,建立了泌阳凹陷断陷湖盆层序地层模式,认为泌阳凹陷断陷湖盆完整的陆相层序体系域具有四分性:低水位体系域、水进体系域、高水位体系域及水退体系域。分析了主要含油层段下第三系核桃园组地层发育三种类型的三角洲沉积砂体:扇三角洲、近源三角洲和远源三角洲,并对其储集性能进行了分析比较。
Detailed studies of a number of core sections, well logs and seismic data of the Biyang depression reveal that the depression had a special construction style and forming mechanism. In southern and eastern basin, where the main controlling faulting is apparent, steep slope growth break sequence dominates. The northern side of the basin belongs to a typical gentle slope sequence, resembling the grouth fault sequence model of the Gulf of Mexico. Through analyzing the particular structural background, which controlled predominantly the sequence system tracts, the pattern of strata sequence and deposition of the Biyang depression are established. The authors believe that the whole terrigenous sequence stratigraphy of the Biyang depression could be divided into four parts: lowstand systems tract, transgressive systems tract, highstand systems tract , and regressive systems tract. Three types of delta sandstones, fan-delta , near source delta and the far source delta, have been recognized in the primary oil bearing layers of the Early Tertiary Hetaoyang Formation. Their capibility to host petroleum is also discussed.
Detailed studies of a number of core sections, well logs and seismic data of the Biyang depression reveal that the depression had a special construction style and forming mechanism. In southern and eastern basin, where the main controlling faulting is apparent, steep slope growth break sequence dominates. The northern side of the basin belongs to a typical gentle slope sequence, resembling the grouth fault sequence model of the Gulf of Mexico. Through analyzing the particular structural background, which controlled predominantly the sequence system tracts, the pattern of strata sequence and deposition of the Biyang depression are established. The authors believe that the whole terrigenous sequence stratigraphy of the Biyang depression could be divided into four parts: lowstand systems tract, transgressive systems tract, highstand systems tract , and regressive systems tract. Three types of delta sandstones, fan-delta , near source delta and the far source delta, have been recognized in the primary oil bearing layers of the Early Tertiary Hetaoyang Formation. Their capibility to host petroleum is also discussed.
引文
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[14]杨道庆,邱荣华,赵追,等.泌阳凹陷北坡下切谷—低位扇沉积体系及其油气勘探意义[J].石油地球物理勘探,2002,37(5):485490.YANG Dao qing,QIU Rong hua,ZHAO Zhui,et al.Eroded valley-topogenetic lowstand fan sendimenta ry system in north slope ofBiyang depression and itssignificance in oil and gas exploration[J ].OGP,2002,37(5):485490.
[2]胡受权.南襄盆地泌阳断陷成盆机制及其成盆史[J].桂林工学院学报,1998,18(1):815.HU Shou quan.The mechanism and history ofBiyangfault basin inNanxiang basin[J].Acta ofGuilinCollegeTechonogy,1998,18(1):815.
[3]王定一,车自成.南襄盆地构造形成机制[J].石油与天然气地质,1987,8(4):1524.WANG Ding yi,CHE Zi cheng.The mechanism ofstructures inNanxiang basin[J].Oil andGasGeology,1987,8(4):1524.
[4]刘泽容.断块群形成机制和构造模式[M].北京:石油工业出版社,1998.LIU Ze rong.The mechanism and model of faultgroups[M].Beijing:PetroleumIndustryPress,1998.
[5]MitchumR M ,SangreeJ B,VailP R,et al.Recogniz ing sequences and systems tracts from wells logs,Seis mic data, and biostratigraphy:Examples from theLateCenozoic of theGulf ofMexico[J].AAPG Memoir,1994:581.
[6]VailP R,UdemardF A,BowmanS A, et al.Thestratigraphic signatures of tectonics,Eustasy and sedi mentology anoverview[A].In:Einsele, et al. eds.Cycles and events stratigraphy[C].Berlin:Springer-Verlag,1994.
[7]胡受权,颜其彬.泌阳断陷双河—赵凹地区陆相层序地层模式[J].地质科学,1998,33(4):435446.HU Shou quan,YAN Qi bin.The model of terrestrialsequence stratigraphy ofBiyang depression inShuang he-Zhao’ao area[J].GeologyScience,1998,33(4):435446.
[8]刘招君,董清水,王嗣敏,等.陆相层序地层学导论与应用[M].北京:石油工业出版社,2002.LIU Zhao jun,DONG Qing shui,WANG Si min, etal.Introduction to continental sequence stratigraphyand application[M ].Beijing:PetroleumIndustryPress,2002.
[9]纪友亮,张世奇,张宏,等.层序地层学原理及层序成因机制模式[M].北京:地质出版社,1998:127128.JI You liang,ZHANG Shi qi,ZHANG Hong, et al.Principal and mechanism of sequence stratigraphy[M].Beijing:GeologicalPublishingHouse,1998:127128.
[10]解习农,程守田,陆永潮.陆相盆地幕式构造旋回与层序构成[J].地球科学中国地质大学学报,1996,21(1):2733.XIE Xi nong,CHENG Shou tian,LU Yong chao.Epsodic tectonic cycles and internal architectures ofsequences in continental basin[J].EarthScienceJournal ofChinaUniversity ofGeosciences,1996,21(1):2733.
[11]VanWagonerJ C.Siliciclastic sequence stratigraphyin well logs, cores and outcrops: concepts for high resolution correlation of time and facies[J].AAPG,Methods inExplorationSeries7,1990,55:1240.
[12]VanWagonerJ C.Sequence stratigraphy and marineto nonmarine facies architecture ofForland basin stra ta,BookCliiffs,Utah,U.S.A: reply[J].AAPG Bul letin,1998,82(8):16071618.
[13]邓宏文.美国层序地层研究中的新学派高分辨率层序地层学[J].石油与天然气地质,1995,16(2):8997.DENG Hong wen.High resolution sequence stratig raphy of new school ofAmerica sequence stratigraphy[J].Oil andGasGeology,1995,16(2):8997.
[14]杨道庆,邱荣华,赵追,等.泌阳凹陷北坡下切谷—低位扇沉积体系及其油气勘探意义[J].石油地球物理勘探,2002,37(5):485490.YANG Dao qing,QIU Rong hua,ZHAO Zhui,et al.Eroded valley-topogenetic lowstand fan sendimenta ry system in north slope ofBiyang depression and itssignificance in oil and gas exploration[J ].OGP,2002,37(5):485490.
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